Yea, I looked here and there for months and nothing seemed to fit my needs. Some boards were HUGE so would not fit well in my tennis bag. Some too small so could not really show someone using it.

I ended up making my own! That was a frustrating project because copy/paste from my Excel spreadsheets did not jive well into Word and printing. Tons of adjusting sizes and colors but I designed what I wanted in Excel and printed it at Kinkos. Installed in the bottom of a fishing tackle case which holds my myriad of overgrips.

It's about $12 at Walmart, Dick's Sports or other shops. When I get to I'll make a thread on it as the Excel sheet is actually two sheets taped together. I laminated mine for durability but you can just print them and stick them in the bottom of the clear plastic box.